Mastodawn

Matthijs Kooijman Sep 16, 2025

TIL about #DNS #DNAME records, which are like CNAME records, but then allow forwarding an entire DNS subtree to another name or domain.

This seems perfect for forwarding #DKIM records, e.g. have _domainkey.example.com forward to _domainkey.example.net so both share the same set of mailservers. Using DNAME allows a single record, instead of one record per DKIM selector with CNAME (which does not scale).

What's weird is that this approach does not seem to be mentioned anywhere wrt DKIM?

1/2

Show thread

Matthijs Kooijman

Unfortunately, our #DNS provider #Transip does not allow #DNAME records, so the practical use for us (community at https://dewar.nl) is zero (unless we migrate to another provider that supports them, but maybe too much hassle there).

I contacted Transip about this and they were not planning on adding support, but maybe if more people ask about this?

So are you using Transip and would DNAME records be useful for you (for #DKIM) or otherwise, do send them a message about this!

2/2

De WAR Amersfoort